If I found myself stranded on an island with three other people after a shipwreck, the first thing I’d do is:
Ensure everyone is safe and tended to — check for injuries, offer reassurance, and make sure we’re all out of immediate danger (like rising water or harsh weather). Then, I’d suggest we take stock of what we have: any supplies that washed ashore, skills in the group (medical, survival, navigation), and fresh water sources.
Survival starts with calmness, cooperation, and a clear plan. After that, finding drinkable water and shelter would be the next priorities.
It sounds like you was once a navy seal are something, great plan fam.